nRF5 action!

d00616

If supplied with less than 3.6V you can do it with ADC, 1.2V voltage reference and 1/3 prescaling.
But I've only looked at the theory yet.

For this, you can use the implemented hwCPUVoltage() function. Reading the voltage costs nRF51: 260µA/20µs | nRF52: 700µA/3µs

NeverDie

@d00616 said in nRF5 Bluetooth action!:

hwCPUVoltage()

I'm finally installing Visual Micro, because I hope it will help me quickly find where all these functions are defined. With all these new layers, the Arduino IDE is just no longer cutting it.

NeverDie

LOL. Well, Visual Micro found it alright, but just in the wrong place. It found it in MyHwAVR.cpp

scalz

@NeverDie said in nRF5 Bluetooth action!:

@d00616 said in nRF5 Bluetooth action!:

hwCPUVoltage()

I'm finally installing Visual Micro, because I hope it will help me quickly find where all these functions are defined. With all these new layers, the Arduino IDE is just no longer cutting it.

good choice :+1:
for nrf5, the function is located in MyHwNRF5.cpp

NeverDie

@d00616 said in nRF5 Bluetooth action!:

For this, you can use the implemented hwCPUVoltage() function.

I tried this function call on an nRF52 DK, and it seems to work. I then tried it on an Ebyte module, treated as an nRF52 DK "board", and it reported zero voltage. So, probably I just need to do a pin mapping so that it reads the voltage on the proper pin. But which pin/mapping would it be? I thought that Vcc wouldn't really be mappable to anything but Vcc. I guess whichever analog pin (if that's what it is?) is connected to Vcc on the nRF52 DK is the pin I need to find and re-map to its equivalent pin on the Ebyte module. Hmmm.... I'll have to look into which one that would be.

NeverDie

Actually, something different may be going on. Here's the function definition:

uint16_t hwCPUVoltage()
{
	// VDD is prescaled 1/3 and compared with the internal 1.2V reference
	Serial.println("Inside hwCPUVoltage function.");
#if defined(NRF_ADC)
    Serial.println("This is an NRF_ADC.");
	// NRF51:
	// Sampling is done with lowest resolution to minimize the time
	// 20uS@260uA

	// Concurrent ressource: disable
	uint32_t lpcomp_enabled = NRF_LPCOMP->ENABLE;
	NRF_LPCOMP->ENABLE = 0;

	// Enable and configure ADC
	NRF_ADC->ENABLE = 1;
	NRF_ADC->CONFIG = (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos) |
	                  (ADC_CONFIG_PSEL_Disabled << ADC_CONFIG_PSEL_Pos) |
	                  (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) |
	                  (ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos) |
	                  (ADC_CONFIG_RES_8bit << ADC_CONFIG_RES_Pos);
	NRF_ADC->EVENTS_END = 0;
	NRF_ADC->TASKS_START = 1;
	while(!NRF_ADC->EVENTS_END);
	NRF_ADC->EVENTS_END = 0;
	int32_t sample = (int32_t)NRF_ADC->RESULT;
	NRF_ADC->TASKS_STOP = 1;
	NRF_ADC->ENABLE = 0;

	// Restore LPCOMP state
	NRF_LPCOMP->ENABLE = lpcomp_enabled;

	return (sample*3600)/255;

#elif defined(NRF_SAADC)
	// NRF52:
	// Sampling time 3uS@700uA
	Serial.println("This is an NRF_SAADC.");
	int32_t sample;
	NRF_SAADC->ENABLE = SAADC_ENABLE_ENABLE_Enabled << SAADC_ENABLE_ENABLE_Pos;
	NRF_SAADC->RESOLUTION = SAADC_RESOLUTION_VAL_8bit << SAADC_RESOLUTION_VAL_Pos;
	NRF_SAADC->CH[0].PSELP = SAADC_CH_PSELP_PSELP_VDD << SAADC_CH_PSELP_PSELP_Pos;
	NRF_SAADC->CH[0].CONFIG = (SAADC_CH_CONFIG_BURST_Disabled << SAADC_CH_CONFIG_BURST_Pos) |
	                          (SAADC_CH_CONFIG_MODE_SE << SAADC_CH_CONFIG_MODE_Pos) |
	                          (SAADC_CH_CONFIG_TACQ_3us << SAADC_CH_CONFIG_TACQ_Pos) |
	                          (SAADC_CH_CONFIG_REFSEL_Internal << SAADC_CH_CONFIG_REFSEL_Pos) |
	                          (SAADC_CH_CONFIG_GAIN_Gain1_6 << SAADC_CH_CONFIG_GAIN_Pos) |
	                          (SAADC_CH_CONFIG_RESN_Bypass << SAADC_CH_CONFIG_RESN_Pos) |
	                          (SAADC_CH_CONFIG_RESP_Bypass << SAADC_CH_CONFIG_RESP_Pos);
	NRF_SAADC->OVERSAMPLE = SAADC_OVERSAMPLE_OVERSAMPLE_Bypass << SAADC_OVERSAMPLE_OVERSAMPLE_Pos;
	NRF_SAADC->SAMPLERATE = SAADC_SAMPLERATE_MODE_Task << SAADC_SAMPLERATE_MODE_Pos;
	NRF_SAADC->RESULT.MAXCNT = 1;
	NRF_SAADC->RESULT.PTR = (uint32_t)&sample;

	NRF_SAADC->EVENTS_STARTED = 0;
	NRF_SAADC->TASKS_START = 1;
	while (!NRF_SAADC->EVENTS_STARTED);
	NRF_SAADC->EVENTS_STARTED = 0;

	NRF_SAADC->EVENTS_END = 0;
	NRF_SAADC->TASKS_SAMPLE = 1;
	while (!NRF_SAADC->EVENTS_END);
	NRF_SAADC->EVENTS_END = 0;

	NRF_SAADC->EVENTS_STOPPED = 0;
	NRF_SAADC->TASKS_STOP = 1;
	while (!NRF_SAADC->EVENTS_STOPPED);
	NRF_SAADC->EVENTS_STOPPED = 1;

	NRF_SAADC->ENABLE = (SAADC_ENABLE_ENABLE_Disabled << SAADC_ENABLE_ENABLE_Pos);

	return (sample*3600)/255;
#else
	Serial.println("Unknown MCU!!");
	// unknown MCU
	return 0;
#endif
}

One, perhaps likely, theory would be that it doesn't recognize the MCU, which would explain why it returns the value of zero. Well, to debug that, I added the Serial.println(...) statements into the library code (see above) in an attempt to see which of the if-else branches is being taken, but none of the Serial.println(...)'s were printed! Here's a sample of the output from the Ebyte Module:

332641 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
332968 TSF:MSG:READ,0-0-255,s=255,c=3,t=8,pt=1,l=1,sg=0:0
332973 TSF:MSG:FPAR OK,ID=0,D=1
334649 TSM:FPAR:OK
334650 TSM:ID
334651 TSM:ID:REQ
334654 TSF:MSG:SEND,255-255-0-0,s=59,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
336662 TSM:ID
336663 TSM:ID:REQ
336665 TSF:MSG:SEND,255-255-0-0,s=23,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
338673 TSM:ID
338674 TSM:ID:REQ
338676 TSF:MSG:SEND,255-255-0-0,s=242,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
340684 TSM:ID
340685 TSM:ID:REQ
340687 TSF:MSG:SEND,255-255-0-0,s=205,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
342695 !TSM:ID:FAIL
342696 TSM:FAIL:CNT=7
342698 TSM:FAIL:DIS
342700 TSF:TDI:TSL
402703 TSM:FAIL:RE-INIT
402705 TSM:INIT
402706 TSM:INIT:TSP OK
402708 TSM:FPAR
402711 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
403472 TSF:MSG:READ,0-0-255,s=255,c=3,t=8,pt=1,l=1,sg=0:0
403478 TSF:MSG:FPAR OK,ID=0,D=1
404719 TSM:FPAR:OK
404720 TSM:ID
404721 TSM:ID:REQ
404724 TSF:MSG:SEND,255-255-0-0,s=241,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
406732 TSM:ID
406733 TSM:ID:REQ
406735 TSF:MSG:SEND,255-255-0-0,s=205,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
408743 TSM:ID
408744 TSM:ID:REQ
408747 TSF:MSG:SEND,255-255-0-0,s=168,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
410754 TSM:ID
410755 TSM:ID:REQ
410757 TSF:MSG:SEND,255-255-0-0,s=131,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
412765 !TSM:ID:FAIL
412766 TSM:FAIL:CNT=7
412768 TSM:FAIL:DIS
412770 TSF:TDI:TSL
472773 TSM:FAIL:RE-INIT
472775 TSM:INIT
472776 TSM:INIT:TSP OK
472778 TSM:FPAR
472781 TSF:MSG:SEND,255-255-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
472955 TSF:MSG:READ,0-0-255,s=255,c=3,t=8,pt=1,l=1,sg=0:0
472960 TSF:MSG:FPAR OK,ID=0,D=1
474789 TSM:FPAR:OK
474790 TSM:ID
474791 TSM:ID:REQ
474794 TSF:MSG:SEND,255-255-0-0,s=167,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
476802 TSM:ID
476803 TSM:ID:REQ
476805 TSF:MSG:SEND,255-255-0-0,s=131,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
478813 TSM:ID
478814 TSM:ID:REQ
478816 TSF:MSG:SEND,255-255-0-0,s=94,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
480824 TSM:ID
480825 TSM:ID:REQ
480827 TSF:MSG:SEND,255-255-0-0,s=57,c=3,t=3,pt=0,l=0,sg=0,ft=0,st=OK:
482835 !TSM:ID:FAIL
482836 TSM:FAIL:CNT=7
482838 TSM:FAIL:DIS
482840 TSF:TDI:TSL

I'm not quite sure how to interpret that, but pretty clearly it doesn't contain the println's that I was expecting.

Any theories as to what's going on?

NeverDie

Bracketing that and setting it aside, I do now notice this line in the BatteryPoweredSensor demo sketch:

int BATTERY_SENSE_PIN = A0;  // select the input pin for the battery sense point

So, if I map that A0 in the sketch to the A0 of the Ebyte Module, then maybe (hopefully) the voltage measurement will work on the Ebyte Module. I'll give it a try.

NeverDie

Unfortunately, after I add:

#include <mySensors.h>

the locus of control goes somewhere else (I guess the gateway or something?). Anyhow, it makes this very hard to debug.

For instance, the pin of interest is PIN_AIN0. I can't find where it's defined, and I can't print out its value either, because of this locus of control issue.

Anyhow, I think I may wait for others to get up and running with their modules, and start facing the same issues. Maybe then we can help each other figure this stuff out.

d00616

@NeverDie I don't know why the println() doesn't work. There is an "DEBUG_OUTPUT(x, ##VA_ARGS)" macro, you can use when debug is enabled.

NRF_ADC is the nRF51 ADC and NRF_SAADC is the ADC of the nRF52. They are defined when "nrf.h" is included.

What board type have use used for your tests?

NeverDie

@d00616 said in nRF5 Bluetooth action!:

What board type have use used for your tests?

The nRF52832 Ebyte Module.

Terrence

@NeverDie VS Code with the Arduino Extension is your friend.

NeverDie

@d00616 said in nRF5 Bluetooth action!:

What board type have use used for your tests?

I just re-read your question and realized you were asking something else than the question that I answered above.

Answer: nRF52 DK is the board type, because I wired directly to P0.06 as its Tx pin on the Ebyte nRF52832 Module.

NeverDie

@Terrence said in nRF5 Bluetooth action!:

VS Code with the Arduino Extension is your friend.

I'll try that. Maybe it will be a little less of a learning curve than Visual Micro yet still do what I need.

NeverDie

I just now did a brute force hack of the MySensors BatteryPoweredSensor sketch, where I copied and renamed the hwCPUVoltage function from the library and then called it from within a tight loop so that I never lose the locus of control. It worked!

/**
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 *
 * DESCRIPTION
 *
 * This is an example that demonstrates how to report the battery level for a sensor
 * Instructions for measuring battery capacity on A0 are available here:
 * http://www.mysensors.org/build/battery
 *
 */



// Enable debug prints to serial monitor
//#define MY_DEBUG

// Enable and select radio type attached
//#define MY_RADIO_NRF24
//#define MY_RADIO_RFM69
#define MY_RADIO_NRF5_ESB

//#include <MySensors.h>

int BATTERY_SENSE_PIN = A0;  // select the input pin for the battery sense point

//unsigned long SLEEP_TIME = 900000;  // sleep time between reads (seconds * 1000 milliseconds)
unsigned long SLEEP_TIME = 1000;  // sleep time between reads (seconds * 1000 milliseconds)
int oldBatteryPcnt = 0;

uint16_t counter=0;
uint16_t volts=0;

uint16_t theHwCPUVoltage()
{
  // VDD is prescaled 1/3 and compared with the internal 1.2V reference
  Serial.println("Inside hwCPUVoltage function.");
#if defined(NRF_ADC)
    Serial.println("This is an NRF_ADC.");
  // NRF51:
  // Sampling is done with lowest resolution to minimize the time
  // 20uS@260uA

  // Concurrent ressource: disable
  uint32_t lpcomp_enabled = NRF_LPCOMP->ENABLE;
  NRF_LPCOMP->ENABLE = 0;

  // Enable and configure ADC
  NRF_ADC->ENABLE = 1;
  NRF_ADC->CONFIG = (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos) |
                    (ADC_CONFIG_PSEL_Disabled << ADC_CONFIG_PSEL_Pos) |
                    (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) |
                    (ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos) |
                    (ADC_CONFIG_RES_8bit << ADC_CONFIG_RES_Pos);
  NRF_ADC->EVENTS_END = 0;
  NRF_ADC->TASKS_START = 1;
  while(!NRF_ADC->EVENTS_END);
  NRF_ADC->EVENTS_END = 0;
  int32_t sample = (int32_t)NRF_ADC->RESULT;
  NRF_ADC->TASKS_STOP = 1;
  NRF_ADC->ENABLE = 0;

  // Restore LPCOMP state
  NRF_LPCOMP->ENABLE = lpcomp_enabled;

  return (sample*3600)/255;

#elif defined(NRF_SAADC)
  // NRF52:
  // Sampling time 3uS@700uA
  Serial.println("This is an NRF_SAADC.");
  int32_t sample;
  NRF_SAADC->ENABLE = SAADC_ENABLE_ENABLE_Enabled << SAADC_ENABLE_ENABLE_Pos;
  NRF_SAADC->RESOLUTION = SAADC_RESOLUTION_VAL_8bit << SAADC_RESOLUTION_VAL_Pos;
  NRF_SAADC->CH[0].PSELP = SAADC_CH_PSELP_PSELP_VDD << SAADC_CH_PSELP_PSELP_Pos;
  NRF_SAADC->CH[0].CONFIG = (SAADC_CH_CONFIG_BURST_Disabled << SAADC_CH_CONFIG_BURST_Pos) |
                            (SAADC_CH_CONFIG_MODE_SE << SAADC_CH_CONFIG_MODE_Pos) |
                            (SAADC_CH_CONFIG_TACQ_3us << SAADC_CH_CONFIG_TACQ_Pos) |
                            (SAADC_CH_CONFIG_REFSEL_Internal << SAADC_CH_CONFIG_REFSEL_Pos) |
                            (SAADC_CH_CONFIG_GAIN_Gain1_6 << SAADC_CH_CONFIG_GAIN_Pos) |
                            (SAADC_CH_CONFIG_RESN_Bypass << SAADC_CH_CONFIG_RESN_Pos) |
                            (SAADC_CH_CONFIG_RESP_Bypass << SAADC_CH_CONFIG_RESP_Pos);
  NRF_SAADC->OVERSAMPLE = SAADC_OVERSAMPLE_OVERSAMPLE_Bypass << SAADC_OVERSAMPLE_OVERSAMPLE_Pos;
  NRF_SAADC->SAMPLERATE = SAADC_SAMPLERATE_MODE_Task << SAADC_SAMPLERATE_MODE_Pos;
  NRF_SAADC->RESULT.MAXCNT = 1;
  NRF_SAADC->RESULT.PTR = (uint32_t)&sample;

  NRF_SAADC->EVENTS_STARTED = 0;
  NRF_SAADC->TASKS_START = 1;
  while (!NRF_SAADC->EVENTS_STARTED);
  NRF_SAADC->EVENTS_STARTED = 0;

  NRF_SAADC->EVENTS_END = 0;
  NRF_SAADC->TASKS_SAMPLE = 1;
  while (!NRF_SAADC->EVENTS_END);
  NRF_SAADC->EVENTS_END = 0;

  NRF_SAADC->EVENTS_STOPPED = 0;
  NRF_SAADC->TASKS_STOP = 1;
  while (!NRF_SAADC->EVENTS_STOPPED);
  NRF_SAADC->EVENTS_STOPPED = 1;

  NRF_SAADC->ENABLE = (SAADC_ENABLE_ENABLE_Disabled << SAADC_ENABLE_ENABLE_Pos);

  return (sample*3600)/255;
#else
  Serial.println("Unknown MCU!!");
  // unknown MCU
  return 0;
#endif
}


void setup()
{
  Serial.begin(115200);
  Serial.println("Setup procedure beginning.");
  while (true) {
    volts=theHwCPUVoltage();
    Serial.print("counter=");
    Serial.print(counter++);
    Serial.print(", hwCPUVoltage=");
    Serial.println(volts);
  }
	// use the 1.1 V internal reference
//#if defined(__AVR_ATmega2560__)
//	analogReference(INTERNAL1V1);
//#else
//	analogReference(INTERNAL);
//#endif
}

Here is a sample of the output:

Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5013, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5014, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5015, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5016, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5017, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5018, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5019, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5020, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5021, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5022, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5023, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5024, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5025, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5026, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5027, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5028, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5029, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5030, hwCPUVoltage=3289
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5031, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5032, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5033, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5034, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5035, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5036, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5037, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5038, hwCPUVoltage=3289
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5039, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5040, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5041, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5042, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5043, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5044, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5045, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5046, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5047, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.

counter=5048, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5049, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5050, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5051, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5052, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5053, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5054, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5055, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5056, hwCPUVoltage=3303
Inside hwCPUVoltage function.
This is an NRF_SAADC.
counter=5057, hwCPUVoltage=3303

NeverDie

Besides that it can now do println()'s, the other good news is that it looks like I won't need to change the pin assignment.

Too bad the demo sketch only transmits one byte of voltage information, rather than two bytes.

d00616

@NeverDie said in nRF5 Bluetooth action!:

I tried this function call on an nRF52 DK, and it seems to work. I then tried it on an Ebyte module, treated as an nRF52 DK "board", and it reported zero voltage.

I have tried the hwCPUVoltage() function with an Ebyte and an RedBear module. Both modules are reporting the voltage.

NeverDie

Received a new module. Here's a size comparison with the Ebyte Module:

NeverDie

Breakout board for the Ebyte nRF52832 module is now completed:
https://www.openhardware.io/view/436/nRF52832-Breakout-Board#tabs-comments

Mike_Lemo

@NeverDie Dam you why would you make it so wide? can it fit on a single bread board?

Also how did you get those so fast?

NeverDie

@Mike_Lemo said in nRF5 Bluetooth action!:

Dam you why would you make it so wide?

In 20/20 hindsight, you're right. At the time I designed it I had huge concerns that the range on the nRF52832 might be awful, because the Adafruit nRF52832 feather that I tested had poor range. So, I gave it a very large ground plane to see if maybe that cured the problem. Only later did I receive the Ebyte module, which turned out to have good range even by itself.

can it fit on a single bread board?

Sorry, you'll need two.

Also how did you get those so fast?

OSH PARK averages around two weeks for me. That's the main reason why I buy from them.

nRF5 action!

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